Classifications

• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
  • C04B14/02—Granular materials, e.g. microballoons
  • C04B14/04—Silica-rich materials; Silicates
  • C04B14/20—Mica; Vermiculite
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
  • Y10S524/925—Natural rubber compositions having nonreactive materials, i.e. NRM, other than: carbon, silicon dioxide, glass titanium dioxide, water, hydrocarbon or halohydrocarbon

Definitions

• the reinforcing filler which I have found particularly suitable for this purpose consists principally of hydrous mica specifically these are the illites.
• Illites are a group of mica-resembling hydrolyzed minerals usually formed from the primary minerals felspar, mica and/or chlorite. As described in the text (pages 156 and 157) X-Ray Identification and Crystal Structures of Clay Minerals, by G. W. Brindley, London 1951, the hydrous micas lie between two well-defined groups of minerals, the well-crystallized micas and the expanding minerals, vermiculite and the montmorillonoids.
• the intermediates between the non-expanding clay micas, the illites, and the expanding minerals are the mixed-layer minerals which consist of inter-layered mixtures of mica layers and vermiculite layers in some cases and mica layers and montrnorillonoid layers in others.
• the hydrous micas are a well-defined mineral group and are classified according to their alkali content which is a measure of the charge per layer as well as in the crystal series, dioctahedral and trioctahedral.
• the illites are intermediate in alkali content between the higher alkali value in the mica and the lower alkali value in the vermiculite. This decrease in alkali content is a measure of the decrease in the negative charge on the layer.
• a mixture containing by volume of natural rubber, about 25% by volume of carbon black and about 25 by volume of illites (1 micron or less) plus necessary additional materials can easily be worked for instance on a rolling mill obtaining a continuous sheet while corresponding mixtures where the illite is replaced by other special fillers do not produce a continuous sheet.
• hydromica as a reinforcing filler it is possible to use relatively small quantities of sulphur and accelerator(s) and still obtain relatively great tensile strength and elongation or break considerably greater than when using other first class fillers.
• hydrous mica as a filler provides a processing advantage and during the working homogeneous mixtures are formed from the raw ingredients more quickly than when known fillers are used so that the cycle of compounding (time for mixing) is reduced by 20 to 35% and consequently the capacity of the rubber-mixing machinery is increased correspondingly.
• caoutchouc As well as synthetic rubber products, for example rubber-like products obtained by the polymerisation of isoprene or its derivatives.
• a composition consisting essentially of (a) a member selected from the group consisting of natural rubber and isoprene polymer rubber, and of (b) a finely-divided inorganic mineral filler consisting of illite in an amount of up to 50% by volume based upon said rubber, and of (0) carbon black in an amount up to 50% by volume based upon said rubber.
• composition as claimed in claim 1 wherein said illite has a particle size of less than 1 micron.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Organic Chemistry (AREA)
• Civil Engineering (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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Cited By (1)

Citations (2)

• 0
  • LU LU31965D patent/LU31965A1/xx unknown
  • BE BE517022D patent/BE517022A/xx unknown
• 1953
  • 1953-01-15 US US331489A patent/US2752323A/en not_active Expired - Lifetime
  • 1953-01-17 FR FR1069911D patent/FR1069911A/fr not_active Expired

Patent Citations (2)

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